Stalling Flashcards
1
Q
What is a stall?
A
Separation of airflow from the upper surface of the wing
2
Q
What happens when there is low airflow energy?
A
Air gets knocked off the wing by the adverse pressure gradient
3
Q
Where does the adverse pressure gradient start?
A
At the point of max thickness
4
Q
Consequences of a stall
A
- Lift decreases
- More parasite drag
- CP moves aft
- A/C pitches down
- Uncommanded roll
- Unresponsive controls
5
Q
Vs
A
Current stall speed
6
Q
VS1G
A
Stall speed at 1G
7
Q
VS1
A
Stall speed in a given configuration
8
Q
VS0
A
Stall speed in the landing config
9
Q
VSR
A
Reference stall speed
10
Q
What is a deep stall most likely to happen with?
A
- T-tail
- Swept back wing
11
Q
Two types of stall warnings
A
- Natural
- Artificial
12
Q
Examples of natural stall warnings
A
- Difficult to maintain altitude
- Sluggish controls
- Pre stall buffet
13
Q
Examples of artificial stall warnings
A
- Audio
- Visual
- Sensory (stick shaker)
14
Q
Flapper switch
A
- Switch on the leading edge of the wing
- High AoA = low stagnation point
- Pushes against switch
15
Q
Vane
A
- Contains mini aerofoil
- Aligns with RAF and measures AoA
